万宁港北渔港避风锚地扩建工程潮流分析研究

Analysis and research on tidal flow of the extension project of shelter anchorage at Wanning North fishing port

渔港避风锚地潮流流速、流态对船舶安全停泊具有重要影响。针对万宁港北渔港避风锚地扩建工程的实施,结合工程水域历史大小潮水文观测资料,采用二维潮流模型对工程实施前后的潮流流态进行模拟研究,分析工程实施以后流场特征及其可能对周边水动力环境带来的影响。研究结果表明:工程实施后,航道疏浚水深增加,过水断面面积相应增加,航道处在二维平面上表现为流速略有减小。与此同时,由于航道浚深,水流向航道处集中,航道两侧的分流作用减弱,流速也略有减小;与小海南汊道整治工程实施叠加后,南汊道的分流作用明显;小海北汊道分流作用减弱,流速下降。

The tidal current velocity and flow pattern of the shelter anchorage in the fishing port have an important influence on the safe berthing of ships.In this paper,hydrodynamic reference for the expansion project of the sheltered anchorage at Wanning North fishing port was provided.By integrating historical tidal and hydrological observation data of engineering water bodies,a two-dimensional tidal model was employed to simulate the tidal flow patterns before and after the implementation of the project.The flow field characteristics and possible impacts on the surrounding hydrodynamic environment after the implementation of the project were analyzed.The research results indicate that after the implementation of the project,the dredging depth of the waterway increases,and the cross-sectional area of the waterway also increases.The waterway is located in a two-dimensional plane,showing a slight decrease in flow velocity.At the same time,due to the depth of the waterway dredging,the water flow is concentrated towards the waterway,and the diversion effect on both sides of the waterway is weakened,resulting in a slight decrease in flow velocity.After the implementation of the project and the Xiaohai South-Branch Improvement Project,the diversion effect of the South Branch Road is obvious.The diversion effect of the Xiaohai North-Branch,where the project is located,is weakened,and the flow velocity decreases.